The outline structure of Org documents lends itself to an inheritance
model of properties: if the parent in a tree has a certain property,
the children can inherit this property. Org mode does not turn this
on by default, because it can slow down property searches
significantly and is often not needed. However, if you find
inheritance useful, you can turn it on by setting the variable
org-use-property-inheritance. It may be set to
t to make all
properties inherited from the parent, to a list of properties that
should be inherited, or to a regular expression that matches inherited
properties. If a property has the value
nil, this is interpreted as
an explicit un-define of the property, so that inheritance search
stops at this value and returns
Org mode has a few properties for which inheritance is hard-coded, at least for the special applications for which they are used:
The ‘COLUMNS’ property defines the format of column view (see Column View). It is inherited in the sense that the level where a ‘COLUMNS’ property is defined is used as the starting point for a column view table, independently of the location in the subtree from where columns view is turned on.
For agenda view, a category set through a ‘CATEGORY’ property applies to the entire subtree.
For archiving, the ‘ARCHIVE’ property may define the archive location for the entire subtree (see Moving a tree to an archive file).
The ‘LOGGING’ property may define logging settings for an entry or a subtree (see Tracking TODO state changes).